Answer Posted / gaurav kr rai
in a conductor the resistance on the surface is lesser than the resistance in the core of the conductor because of the cross sectional area increased at surface as we know that resistance R is inversely proportional to cross sectional area.So when an A.C. current passes through the conductor mostly it travels on the surface of the conductor and this phenomena is known as skin effect.
Is This Answer Correct ? | 0 Yes | 4 No |
Post New Answer View All Answers
I have a small system with two motors that are running on 380 vac, 60 hz. These motors are expensive and I usally get them from Brazil. I am adding another motor to the system, but I want to purchase a 480 vac, 60 hz motor to use. It will be on a VFD that is rated fro 380 thru 480. Is this posible and will I have to use a larger motor and derate it?
Can Anyone suggest the Standards (IEC or IS) for selecting copper current density?
difference between power surge and switching transient
how we can calculate chiller required ampear?
What are :- AC Distribution Board (Single & Double Front) DC Distribution Boards Distribution Board LT Breaker Panel.
What is electrical grounding?
To prove the capacity of a 10MVA transforemr with 6.5% impedance by a short circuit test how much power is needed to inject an impedance voltage if we have to arrive for its rated current?
what are the advantages and disadvantages of speed control of 3 phase induction motor by varying frequency explain with drawing
Why does the speed regulating system adopting I controller have no steady-state error? In this single closed-loop speed regulating system, when the input of the I controller Un=0, what is the output voltage of the regulator? What factors do the output voltage depend on?
What is the use of oil in transformers?
Mention what are the different colors on wires indicates?
why they were using TRIAC instead relay in some controllers and what is the advantages.
what is the criteria for selecting fuse rating in 1phase, 2phase & 3phase welding sets?
Is there any question in the name of Static Switch in UPS??
if you are in a software company,then why do you want to come in a core company like sail, ntpc(where lots of trouble like tension but you have a good life in a it company) ?